Data Sheet

Page 100
RFM95/96/97/98
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WIRELESS & SENSING PRELIMINARY DATASHEET
Name
(Address)
Bits
Variable Name
Mode
Default
value
FSK/OOK Description
RegAgcRef
(0x61)
7-6
unused
r
-
unused
5-0
AgcReferenceLevel
rw
0x19
Sets the floor reference for all AGC thresholds:
AGC Reference[dBm]=
-174dBm+10*log(2*RxBw)+SNR+AgcReferenceLevel
SNR = 8dB, fixed value
RegAgcThresh1
(0x62)
7-5
unused
r
-
unused
4-0
AgcStep1
rw
0x0c
Defines the 1st AGC Threshold
RegAgcThresh2
(0x63)
7-4
AgcStep2
rw
0x04
Defines the 2nd AGC Threshold:
3-0
AgcStep3
rw
0x0b
Defines the 3rd AGC Threshold:
RegAgcThresh3
(0x64)
7-4
AgcStep4
rw
0x0c
Defines the 4th AGC Threshold:
3-0
AgcStep5
rw
0x0c
Defines the 5th AGC Threshold:
6.3. Band Specific Additional Registers
The registers in the address space from 0x61 to 0x73 are specific for operation in the lower frequency bands (below 525
MHz), or in the upper frequency bands (above 860 MHz). Their programmed value may differ, and are retained when
switching from lower to high frequency and vice-versa. The access to the band specific registers is granted by enabling or
disabling the bit 3 LowFrequencyModeOn of the RegOpMode register. By default, the bit LowFrequencyModeOn is at „1‟
indicating that the registers are configured for the low frequency band.
Table 87 Low Frequency Additional Registers
Name
(Address)
Bits
Variable Name
Mode
Default
value
Low Frequency Additional Registers
RegAgcRefLf
(0x61)
7-6
unused
r
-
unused
5-0
AgcReferenceLevel
rw
0x19
Sets the floor reference for all AGC thresholds:
AGC Reference[dBm]=
-174dBm+10*log(2*RxBw)+SNR+AgcReferenceLevel
SNR = 8dB, fixed value
RegAgcThresh1Lf
(0x62)
7-5
unused
r
-
unused
4-0
AgcStep1
rw
0x0c
Defines the 1st AGC Threshold
RegAgcThresh2Lf
(0x63)
7-4
AgcStep2
rw
0x04
Defines the 2nd AGC Threshold:
3-0
AgcStep3
rw
0x0b
Defines the 3rd AGC Threshold:
RegAgcThresh3Lf
(0x64)
7-4
AgcStep4
rw
0x0c
Defines the 4th AGC Threshold:
3-0
AgcStep5
rw
0x0c
Defines the 5th AGC Threshold:
RegPllLf
(0x70)
7-6
PllBandwidth
rw
0x03
Controls the PLL bandwidth:
00  75 kHz 10  225 kHz
01  150 kHz 11  300 kHz
5-0
reserved
rw
0x10
reserved. Retain default value